GROUNDWATER RECHARGE SYSTEM

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PROBLEM TO BE SOLVED : To provide a groundwater recharge system, in which water flow efficiency in the recharge system is maintained and clogging of ground near a water injection well may be prevented. SOLUTION : A groundwater recharge system 11 comprises a closed drawn water well 1 for drawing groundwater W, a removal part 20 into which the groundwater W drawn from the drawn water well 1 is introduced and in which floating substance component and metal oxide contained in the groundwater W are removed, a reducing agent supplementation part 14 in which groundwater W filtrated at a filtration part 20 is supplied with reducing agent Re at a level where the oxidation-reduction potential of the groundwater W is reduced to a predetermined value or less, a water injection well 2 for injecting the groundwater W supplied with the reducing agent Re into the ground. The groundwater W drawn from the drawn water well 1 is led to the water injection well 2 via closed water pipes. SELECTED DRAWING : Figure 1 COPYRIGHT : (C)2018, JPO&INPIT